What are the potential security risks associated with using PHP to handle form submissions?

One potential security risk associated with using PHP to handle form submissions is the possibility of SQL injection attacks if user input is not properly sanitized. To mitigate this risk, you should always use prepared statements or parameterized queries when interacting with a database in PHP. 

// Using prepared statements to prevent SQL injection

// Assuming $conn is your database connection

$stmt = $conn->prepare("INSERT INTO users (username, password) VALUES (?, ?)");
$stmt->bind_param("ss", $username, $password);

// Sanitize user input before binding
$username = filter_var($_POST['username'], FILTER_SANITIZE_STRING);
$password = password_hash($_POST['password'], PASSWORD_DEFAULT);

$stmt->execute();
$stmt->close();

Keywords

SQL injection Cross-site scripting (XSS) CSRF attacks Input validation Escaping user input

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